Download or read book Computer Simulation of Single Well Steam Assisted Gravity Drainage SW SAGD SUPRI TR 119 written by and published by . This book was released on 1999 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steam assisted gravity drainage (SAGD) is an effective method of producing heavy oil and bitumen. In a typical SAGD approach, steam is injected into a horizontal well located directly above a horizontal producer. A steam chamber grows around the injection well and helps displace heated oil toward the production well. Single-well (SW) SAGD attempts to create a similar process using only one horizontal well. This may include steam injection from the toe of the horizontal well with production at the heel. Obvious advantages of SW-SAGD include cost savings and utility in relatively thin reservoirs. However, the process is technically challenging. To improve early-time response of SW-SAGD, it is necessary to heat the near-wellbore area to reduce oil viscosity and allow gravity drainage to take place. Ideally heating should occur with minimal circulation or bypassing of stream. Since project economics are sensitive to early production response, we are interested in optimizing the start -up procedure.
Download or read book Bakteriologisch m glichst fehlerfreies Tessiner Engadiner Oberwalliser und andern Alpk sereien written by and published by . This book was released on 1943 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efficient Simulation of Thermal Enhanced Oil Recovery Processes written by Zhouyuan Zhu and published by Stanford University. This book was released on 2011 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulating thermal processes is usually computationally expensive because of the complexity of the problem and strong nonlinearities encountered. In this work, we explore novel and efficient simulation techniques to solve thermal enhanced oil recovery problems. We focus on two major topics: the extension of streamline simulation for thermal enhanced oil recovery and the efficient simulation of chemical reaction kinetics as applied to the in-situ combustion process. For thermal streamline simulation, we first study the extension to hot water flood processes, in which we have temperature induced viscosity changes and thermal volume changes. We first compute the pressure field on an Eulerian grid. We then solve for the advective parts of the mass balance and energy equations along the individual streamlines, accounting for the compressibility effects. At the end of each global time step, we account for the nonadvective terms on the Eulerian grid along with gravity using operator splitting. We test our streamline simulator and compare the results with a commercial thermal simulator. Sensitivity studies for compressibility, gravity and thermal conduction effects are presented. We further extended our thermal streamline simulation to steam flooding. Steam flooding exhibits large volume changes and compressibility associated with the phase behavior of steam, strong gravity segregation and override, and highly coupled energy and mass transport. To overcome these challenges we implement a novel pressure update along the streamlines, a Glowinski scheme operator splitting and a preliminary streamline/finite volume hybrid approach. We tested our streamline simulator on a series of test cases. We compared our thermal streamline results with those computed by a commercial thermal simulator for both accuracy and efficiency. For the cases investigated, we are able to retain solution accuracy, while reducing computational cost and gaining connectivity information from the streamlines. These aspects are useful for reservoir engineering purposes. In traditional thermal reactive reservoir simulation, mass and energy balance equations are solved numerically on discretized reservoir grid blocks. The reaction terms are calculated through Arrhenius kinetics using cell-averaged properties, such as averaged temperature and reactant concentrations. For the in-situ combustion process, the chemical reaction front is physically very narrow, typically a few inches thick. To capture accurately this front, centimeter-sized grids are required that are orders of magnitude smaller than the affordable grid block sizes for full field reservoir models. To solve this grid size effect problem, we propose a new method based on a non-Arrhenius reaction upscaling approach. We do not resolve the combustion front on the grid, but instead use a subgrid-scale model that captures the overall effects of the combustion reactions on flow and transport, i.e. the amount of heat released, the amount of oil burned and the reaction products generated. The subgrid-scale model is calibrated using fine-scale highly accurate numerical simulation and laboratory experiments. This approach significantly improves the computational speed of in-situ combustion simulation as compared to traditional methods. We propose the detailed procedures to implement this methodology in a field-scale simulator. Test cases illustrate the solution consistency when scaling up the grid sizes in multidimensional heterogeneous problems. The methodology is also applicable to other subsurface reactive flow modeling problems with fast chemical reactions and sharp fronts. Displacement front stability is a major concern in the design of all the enhanced oil recovery processes. Historically, premature combustion front break through has been an issue for field operations of in-situ combustion. In this work, we perform detailed analysis based on both analytical methods and numerical simulation. We identify the different flow regimes and several driving fronts in a typical 1D ISC process. For the ISC process in a conventional mobile heavy oil reservoir, we identify the most critical front as the front of steam plateau driving the cold oil bank. We discuss the five main contributors for this front stability/instability: viscous force, condensation, heat conduction, coke plugging and gravity. Detailed numerical tests are performed to test and rank the relative importance of all these different effects.
Download or read book Enhanced Oil Recovery written by Vladimir Alvarado and published by Gulf Professional Publishing. This book was released on 2010-07-30 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced-Oil Recovery (EOR) evaluations focused on asset acquisition or rejuvenation involve a combination of complex decisions, using different data sources. EOR projects have been traditionally associated with high CAPEX and OPEX, as well as high financial risk, which tend to limit the number of EOR projects launched. In this book, the authors propose workflows for EOR evaluations that account for different volumes and quality of information. This flexible workflow has been successfully applied to oil property evaluations and EOR feasibility studies in many oil reservoirs. The methodology associated with the workflow relies on traditional (look-up tables, XY correlations, etc.) and more advanced (data mining for analog reservoir search and geology indicators) screening methods, emphasizing identification of analogues to support decision making. The screening phase is combined with analytical or simplified numerical simulations to estimate full-field performance by using reservoir data-driven segmentation procedures. - Case Studies form Asia, Canada, Mexico, South America and the United States - Assets evaluated include reservoir types ranging from oil sands to condensate reservoirs - Different stages of development and information availability are discussed
Download or read book Commercial scale demonstration enhanced oil recovery by micellar polymer flood written by Marathon Oil Company and published by . This book was released on 1978 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Technology Transfer Program written by National Institute of Law Enforcement and Criminal Justice and published by . This book was released on 1977 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Girish Karnad and Mahesh Dattani written by and published by . This book was released on 2012 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributed articles on Kannada plays of Girish Raghunath Karnad, b. 1938 and English plays of Mahesh Dattani, Indian playwrights.
Download or read book Numerical Simulation of in Situ Combustion microform written by Roy Siqueira and published by National Library of Canada. This book was released on 1985 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mahasweta Devi written by Nandini Sen and published by . This book was released on 2011 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mahāśvetā Debī, b. 1926, Bengali author; contributed articles; some previously published.
Download or read book Subaltern Vision written by Aparajita De and published by Cambridge Scholars Publishing. This book was released on 2012-01-17 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: ""Ever since the Gramscian notion of the subaltern became the lynch-pin of the counter-hegemonic project developed by the Subaltern Studies group in the early 1980s, attempts to give voice to India's unrepresented or under-represented classes have played a
Download or read book Islanded Identities written by Maeve McCusker and published by Rodopi. This book was released on 2011 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary Material -- Island Theory: The Antipodes /Matthew Boyd Goldie -- Writing Against the Tide?: Patrick Chamoiseau's (Is)land Imaginary /Maeve Mccusker -- A Distinctive Disaster Literature: Montserrat Island Poetry under Pressure /Jonathan Skinner -- Rethinking Identity and Belonging: 'Mauritianness' in the Work of Ananda Devi /Ritu Tyagi -- From Slave to Tourist Entertainer: Performative Negotiations of Identity and Difference in Mauritius /Burkhard Schnepel and Cornelia Schnepel -- “Amid the Alien Corn”: British India as Human Island /Ralph Crane -- Journalism and Identity: The Red-Top Hangover and Erosions of 'Island Mentality' in Postcolonial Ireland /Mark Wehrly -- Western Blood in an Eastern Island: Affective Identities in Timor-Leste /Anthony Soares -- “No Man is an Island”: National Literary Canons, Writers, and Readers /Lyn Innes -- Impure Islands: Europe and a Post-Imperial Polity /Paulo de Medeiros -- Notes on Contributors -- Index.
Download or read book Ecological Criticism for Our Times written by and published by . This book was released on 2011 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
